Lighting fixture

Abstract

Multiple light emitting device modules can be configured to illuminate in multiple different directions, while avoiding deterioration of radiation efficiency by use of fins. In a lighting fixture, multiple light emitting device modules can each have fins for radiating heat generated by the light emitting device. The multiple light emitting device modules can be arranged in such a manner that a main optical axis line of one light emitting device module and main optical axis lines of any other light emitting device modules form an angle larger than zero degrees, or are in a skewed position, and the fins can be arranged in such a manner that all the fins are parallel with respect to a vertical plane and roots of the fins are positioned at the same level as or lower than tips of the fins.

1. A lighting fixture comprising:
 a plurality of light emitting device modules each having a light emitting device with an optical axis and fins arranged in parallel to the optical axis of the light emitting device to radiate heat generated by the light emitting device, wherein, 
 the plurality of light emitting device modules are arranged in such a manner that a first main optical axis line of a first of the light emitting device modules and a second main optical axis line of a second of the light emitting device modules form an angle larger than zero degrees with respect to each other, such that the first and second main optical axis lines are displaced in a direction perpendicular to the first and second main optical axis lines, and 
 all the fins are arranged such that the fins are parallel with respect to a vertical plane, and such that all roots of the fins are positioned at a same height as or at a lower height than all tips of the fins, where height is measured along a main optical axis of the lighting fixture. 
 
   
   
     2. The lighting fixture according to  claim 1 , wherein,
 a light distribution pattern of one of the light emitting device modules is formed in an approximately circular shape having a center located at a main optical axis line of the one of the light emitting device modules. 
 
   
   
     3. The lighting fixture according to  claim 2 , wherein the light emitting device in each of the light emitting device modules is approximately circular in shape as viewed from a light emitting direction of the light emitting device. 
   
   
     4. The lighting fixture according to  claim 2 , wherein two or more light emitting devices are arranged about a circle having a center located at a main optical axis line of a respective one of the light emitting device modules. 
   
   
     5. The lighting fixture according to  claim 1 , wherein the light emitting device includes a covering layer and a heat radiation member, and the covering layer is located on a part of the heat radiating member exposed to air, and the covering layer is not formed on a part of the heat radiation member that is in contact with a thing other than the air. 
   
   
     6. The lighting fixture according to  claim 1 , wherein the light emitting device includes a heat radiation member that includes a relatively rough surface exposed to air and a relatively non-rough surface on a part of the heat radiation member that is in contact with a thing other than the air. 
   
   
     7. The lighting fixture according to  claim 5 , wherein the heat radiation member includes a relatively polished surface on a part that is in contact with the something other than the air and a relatively unpolished surface on another surface of the heat radiation member. 
   
   
     8. The lighting fixture according to  claim 5 , wherein a thermally conductive interface material is located at the part in contact with the thing other than the air on the surface of the heat radiation member. 
   
   
     9. The lighting fixture according to  claim 1 , wherein the light emitting device of the plurality of the light emitting device modules includes:
 a connecting member configured to connect a light emitting device feeding electrode for feeding the light emitting device, with an external electrode, 
 the connecting member being placed within a space and including a first terminal and a second terminal, and 
 the connecting member being constrained in such a manner that the first terminal is connected to the light emitting device feeding electrode, and serves as a fixed end, and the second terminal is configured for connection to the external electrode and serves as a free end. 
 
   
   
     10. The lighting fixture according to  claim 9 , wherein,
 the heat radiation member for radiating heat generated by the light emitting device is located closer to the light emitting device than the light emitting device feeding electrode. 
 
   
   
     11. The lighting fixture according to  claim 10 , wherein,
 an adhesive agent connects the light emitting device onto the heat radiation member, and an anti-running means for preventing the adhesive agent from flowing out from between the light emitting device and the heat radiation member is provided. 
 
   
   
     12. The lighting fixture according to  claim 9 , wherein,
 the connecting member includes a flexible substrate, and the flexible substrate includes a hole configured to guide the flexible substrate toward an external electrode side of the light emitting device. 
 
   
   
     13. The lighting fixture according to  claim 1 , wherein the light emitting device of the plurality of the light emitting device modules includes a feeding electrode for feeding power to the light emitting device, and a connecting member configured to connect the feeding electrode with an external electrode, the connecting member being placed within a space and including a first terminal and a second terminal, and the connecting member being constrained in such a manner that the first terminal is connected to the feeding electrode of the light emitting device, and serves as a fixed end, and the second terminal is configured for connection to the external electrode and serves as a free end. 
   
   
     14. The lighting fixture according to  claim 13 , wherein,
 the heat radiation member for radiating heat generated by the light emitting device is located closer to the light emitting device than the feeding electrode of the light emitting device. 
 
   
   
     15. The lighting fixture according to  claim 14 , wherein,
 an adhesive agent connects the light emitting device onto the heat radiation member, and the lighting fixture includes anti-running means for preventing the adhesive agent from flowing out from between the light emitting device and the heat radiation member. 
 
   
   
     16. The lighting fixture according to  claim 13 , wherein,
 the connecting member includes a flexible substrate, and the flexible substrate includes a hole configured to guide the flexible substrate toward an external electrode side of the light emitting device. 
 
   
   
     17. A lighting fixture comprising:
 a plurality of light emitting device modules each having a light emitting device having an optical axis and fins arranged in parallel to the optical axis of the light emitting device to radiate heat generated by the light emitting device, wherein, 
 the plurality of light emitting device modules are arranged in such a manner that a first main optical axis line of a first of the light emitting device modules and a second main optical axis line of a second of the light emitting device modules form an angle larger than zero degrees with respect to each other, and 
 a substantial portion of the fins are configured such that the substantial portion of fins are parallel with respect to each other and with respect to a vertical plane, and such that all roots of the substantial portion of the fins are positioned at a same height as or at a lower height than all tips of the substantial portion of the fins, wherein height is measured along a main optical axis of the lighting fixture, and height becomes lower in the light emitting direction of the lighting fixture. 
 
   
   
     18. The lighting fixture according to  claim 17 , wherein the light emitting device in each of the light emitting device modules is approximately circular in shape as viewed from a light emitting direction of the light emitting device. 
   
   
     19. The lighting fixture according to  claim 17 , wherein at least two light emitting devices are arranged about a circle having a center located at a main optical axis line of a respective light emitting device module. 
   
   
     20. The lighting fixture according to  claim 17 , wherein the light emitting device of the plurality of light emitting device modules includes,
 a light emitting semiconductor device that includes an electrode terminal, 
 a flexible substrate attached to the electrode terminal of the light emitting semiconductor device, 
 a substrate onto which the light emitting semiconductor device is mounted, and 
 means for allowing the flexible substrate to move relative to the substrate.